These Oxigen-brand plastic sports men's glasses have frames that mean business. Sunglasses with thinner frames are much more fragile than their thicker-framed counterparts. When you purchase sunglasses on a regular basis, you will need to invest in ones that will stand the test of time. It's hard to tell what will happen to your sunglasses during the time that you own them. You might do everything in your power to take care of them and still have to deal with pieces breaking off. You have to find sunglasses that are made with solid materials and come from a great organization.